6x-27=11-5xX? Y?

6x-27=11-5xX? Y? 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-7 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-708） (x-y)(x+y)(xx-yy)=? 已知xx+yy+4x-6y+13=0,求（xx-2x）/xx+3yy的值. 9x-11y+1=0,4xx-5y-3=0 xx+2x+yy+6y+10=0求xx+yy的值 若xx-2x+yy+6y+10=0 求xx-yyy的值 若xx-2x+yy+6y+10=0 求xx-yyy的值 x,+y=5 xy=3 求xx+yy {2【x-150】=5【3y+50】10%Xx+6%Xy=8.5%X800 x+y+z=5,xx+yy+zz=6,求xy-xz-yz的解越快越好 求抛物线y=xx+5x+6与两坐标轴的交点 已知式子9-6y-4xX=7,求2XX+3Y+7的值这里XX是X的平方 已知XX+YY+4X-6Y+13=0,则X的Y次方是 xx+yy+5/4 =2x+y 求x+y的值 求{5x-3y+z= -2 ,5x+2y-4x=3 ,-5x+y-z=2}方程组的解由1+2,得即由2+3,得把xx=XX代入1,得把xx=xx,xx=xx代入1,得所以,原方程的解是 智力题-填等式xx 将123456789填入x中y xx y是加减乘除符号-----= xx Y x 数字不能从xx